News tagged with 21st century

Warming turns tundra to forest

(Phys.org) -- In just a few decades shrubs in the Arctic tundra have turned into trees as a result of the warming Arctic climate, creating patches of forest which, if replicated across the tundra, would significantly ...

Jun 04, 2012
3.9 / 5 (17) 125 | with audio podcast

Today's severe drought, tomorrow's normal

(PhysOrg.com) -- While the worst drought since the Dust Bowl of the 1930s grips Oklahoma and Texas, scientists are warning that what we consider severe drought conditions in North America today may be normal ...

Dec 06, 2011
3.6 / 5 (12) 8 | with audio podcast

Rare earth metals: Will we have enough?

Life in the 21st century wouldn't be the same without rare earth metals. Cell phones, iPads, laptops, televisions, hybrid cars, wind turbines, solar cells and many more products depend on rare earth metals ...

Sep 20, 2012
4.1 / 5 (8) 13

Vertical farms offer a bright future for hungry cities

The 21st century has seen rapid urbanisation and the global population is now expected to grow to more than 8.3 billion by 2050. Currently, 800m hectares โ€“ 38% of the earth's land surface โ€“ is farmed ...

Jul 21, 2014
4.9 / 5 (12) 30

Cities, states face off on municipal broadband

Wilson, N.C., determined nearly a decade ago that high-speed Internet access would be essential to the community's social and economic health in the 21st century, just as electricity, water and sewers were in the previous ...

Aug 19, 2014
5 / 5 (3) 1

The challenges facing archivists in the 21st century

UCLA professor of information studies Anne Gilliland says that understanding the history of archival science is critical to understanding where the field is going. In her new book, "Conceptualizing 21st Century ...

Jun 05, 2014
4.5 / 5 (2) 0